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US Patent: 390,190
Turret-lock
Patentee: Francis H. Richards (exact or similar names) - Hartford, CT USPTO Classifications: 188/69, 29/45, 74/813L Tool Categories: metalworking machines : metal lathes : turret lathes Assignees: Francis H. Richards - Hartford, CT Pratt & Whitney Co. - Hartford, CT Manufacturer: Pratt & Whitney Co. - Hartford, CT Witnesses: W. M. Ryorkman Wilbur M. Stone	Patent Dates: Applied: Jun. 20, 1888 Granted: Sep. 25, 1888 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Pratt & Whitney Co.

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